/**
* ClassName: BusinessInfo
* Package: src/views
* Description: 商家信息页面
*
* @Author Liu Wenrui
* @Create 2025/9/24 16:00
* @Version 1.1
*
* @Author Liu Wenrui
* @Create 2025/9/25 17:45
* @Version 1.2
*/

<template>
    <div class="wrapper">
        <!-- header部分 -->
        <header>
            <span class="back-btn" @click="goBack">&#8592;</span>
            <p>商家信息</p>
        </header>
        <!-- 商家logo部分 -->
        <div class="business-logo">
            <img :src="getImg(business.businessImg)">
        </div>
        <!-- 商家信息部分 -->
        <div class="business-info">
            <h1>{{ business.businessName }}</h1>
            <p>&#165;{{ business.startPrice }}起送 &#165;{{ business.deliveryPrice }}配送</p>
            <p>{{ business.businessExplain }}</p>
        </div>
        <!-- 食品列表部分 -->
        <ul class="food">
            <li v-for="(item, index) in foodArr">
                <div class="food-left">
                    <!-- 所有食品都显示图片 -->
                    <img :src="getImg(item.foodImg)">
                    <div class="food-left-info">
                        <h3>{{ item.foodName }}</h3>
                        <p>{{ item.foodExplain }}</p>
                        <p>&#165;{{ item.foodPrice }}</p>
                        <!-- 下架提示 -->
                        <p v-if="!item.onSale" style="color:#dc3545;font-weight:bold;">已下架</p>
                    </div>
                </div>
                <!-- 只有上架食品显示加购按钮 -->
                <div class="food-right" v-if="item.onSale">
                    <i class="fa fa-minus-circle" @click="minus(index)" v-show="item.quantity != 0"></i>
                    <span class="food-quantity" v-show="item.quantity != 0">{{ item.quantity }}</span>
                    <i class="fa fa-plus-circle" @click="add(index)"></i>
                </div>
            </li>
        </ul>
        <!-- 购物车部分 -->
        <div class="cart">
            <div class="cart-left">
                <div class="cart-left-icon"
                    :style="totalQuantity == 0 ? 'background-color:#505051;' : 'background-color:#3190E8;'">
                    <i class="fa fa-shopping-cart"></i>
                    <div class="cart-left-icon-quantity" v-show="totalQuantity != 0">
                        {{ totalQuantity }}</div>
                </div>
                <div class="cart-left-info">
                    <p>&#165;{{ totalPrice }}</p>
                    <p>另需配送费{{ business.deliveryPrice }}元</p>
                </div>
            </div>
            <div class="cart-right">
                <!-- 不够起送费 -->
                <div class="cart-right-item" v-show="totalPrice < business.startPrice"
                    style="background-color: #535356;cursor: default;">
                    &#165;{{ business.startPrice }}起送
                </div>
                <!-- 达到起送费 -->
                <div class="cart-right-item" @click="toOrder" v-show="totalPrice >= business.startPrice">
                    去结算
                </div>
            </div>
        </div>
    </div>
</template>
<script>
export default {
    name: 'BusinessInfo',
    data() {
        return {
            businessId: this.$route.query.businessId,
            business: {},
            foodArr: [],
            user: {}
        }
    },
    created() {
        this.$axios.get("/user")
            .then(response => {
                this.user = response.data;
            }).catch(error => {
                console.error(error);
        });
        //根据businessId查询商家信息
        this.$axios.get(`/businesses/public/${this.businessId}`)
            .then(response => {
                if (response.data.success && response.data.data) {
                    this.business = response.data.data;
                } else {
                    alert(response.data.message || '店铺不存在');
                }
            }).catch(error => {
                console.error(error);
            });

        //根据businessId查询所属食品信息
        this.$axios.get(`/foods/public/business/${this.businessId}`)
            .then(response => {
                if (response.data.success && response.data.data) {
                    this.foodArr = response.data.data;
                    for (let i = 0; i < this.foodArr.length; i++) {
                        this.$set(this.foodArr[i], 'quantity', 0);
                    }
                    if (this.user != null) {
                        this.listCart();
                    }
                } else {
                    this.foodArr = [];
                }
            }).catch(error => {
                console.error(error);
            });
    },
    methods: {
        getImg(img) {
            if (img && (img.startsWith('http://') || img.startsWith('https://'))) {
                return img;
            }
            try {
                return require('../assets/' + img);
            } catch (e) {
                return require('../assets/default.png');
            }
        },
        goBack() {
            this.$router.back();
        },
        listCart() {
            this.$axios.get('/carts/current-user')
                .then(response => {
                    if (response.data.success && response.data.data) {
                        let cartArr = response.data.data;
                        for (let i = 0; i < this.foodArr.length; i++) {
                            let temp = 0;
                            for (let cartItem of cartArr) {
                                if (cartItem.foodId === this.foodArr[i].id) {
                                    temp += cartItem.quantity;
                                }
                            }
                            this.$set(this.foodArr[i], 'quantity', temp);
                        }
                    }
                }).catch(error => {
                    console.error(error);
                });
        },
        add(index) {
            //首先做登录验证
            if (this.user == null) {
                this.$router.push({
                    path: '/login'
                });
                return;
            }
            this.$axios.post('/carts', {
                food: this.foodArr[index], // 食品对象
                business: this.business,   // 商家对象
                customer: this.user,       // 用户对象
                quantity: 1
            }).then(response => {
                if (response.data.success) {
                    this.listCart();
                } else {
                    alert('添加购物项失败！');
                }
            }).catch(error => {
                console.error(error);
            });
        },
        minus(index) {
            if (!this.user) {
                this.$router.push({ path: '/login' });
                return;
            }
            this.$axios.get('/carts/current-user')
                .then(response => {
                    if (response.data.success && response.data.data) {
                        let cartArr = response.data.data;
                        // 找到 foodId 匹配且 id 最大的购物项
                        let target = null;
                        for (let cartItem of cartArr) {
                            if (cartItem.foodId === this.foodArr[index].id) {
                                if (!target || cartItem.id > target.id) {
                                    target = cartItem;
                                }
                            }
                        }
                        if (target) {
                            this.$axios.delete('/carts', {
                                data: { id: target.id }
                            }).then(res => {
                                if (res.data.success) {
                                    this.listCart();
                                } else {
                                    alert('删除购物项失败！');
                                }
                            }).catch(error => {
                                console.error(error);
                            });
                        } else {
                            alert('没有可删除的购物项！');
                        }
                    }
                }).catch(error => {
                    console.error(error);
                });
        },
        toOrder() {
            this.$router.push({
                path: '/orders',
                query: {
                    businessId: this.businessId
                }
            });
        }
    },
    computed: {
        //食品总价格
        totalPrice() {
            let total = 0;
            for (let item of this.foodArr) {
                total += item.foodPrice * 100 * item.quantity;
            }
            return (total / 100).toFixed(2);
        },
        //食品总数量
        totalQuantity() {
            let quantity = 0;
            for (let item of this.foodArr) {
                quantity += item.quantity;
            }
            return quantity;
        },
        //结算总价格
        totalSettle() {
            return parseFloat(this.totalPrice) + this.business.deliveryPrice;
        }
    }
}
</script>
<style scoped>
/****************** 总容器 ******************/
.wrapper {
    width: 100%;
    height: 100%;
}

/****************** header部分 ******************/
.wrapper header {
    width: 100%;
    height: 12vw;
    background-color: #0097FF;
    color: #fff;
    font-size: 4.8vw;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.back-btn {
    position: absolute;
    left: 3vw;
    top: 50%;
    transform: translateY(-50%);
    font-size: 4vw;
    cursor: pointer;
    color: #fff;
    z-index: 1001;
    padding: 0 1vw;
    user-select: none;
}

/****************** 商家logo部分 ******************/
.wrapper .business-logo {
    width: 100%;
    height: 35vw;
    /*使用上外边距避开header部分*/
    margin-top: 12vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

.wrapper .business-logo img {
    width: 40vw;
    height: 30vw;
    border-radius: 5px;
}

/****************** 商家信息部分 ******************/
.wrapper .business-info {
    width: 100%;
    height: 20vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.wrapper .business-info h1 {
    font-size: 5vw;
}

.wrapper .business-info p {
    font-size: 3vw;
    color: #666;
    margin-top: 1vw;
}

/****************** 食品列表部分 ******************/
.wrapper .food {
    width: 100%;
    /*使用下外边距避开footer部分*/
    margin-bottom: 14vw;
}

.wrapper .food li {
    width: 100%;
    box-sizing: border-box;
    padding: 2.5vw;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wrapper .food li .food-left {
    display: flex;
    align-items: center;
}

.wrapper .food li .food-left img {
    width: 20vw;
    height: 20vw;
}

.wrapper .food li .food-left .food-left-info {
    margin-left: 3vw;
}

.wrapper .food li .food-left .food-left-info h3 {
    font-size: 3.8vw;
    color: #555;
}

.wrapper .food li .food-left .food-left-info p {
    font-size: 3vw;
    color: #888;
    margin-top: 2vw;
}

.wrapper .food li .food-right {
    min-width: 12vw;
    /* 可选，保证不太窄 */
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3vw;
}

.wrapper .food li .food-right .fa-minus-circle {
    font-size: 5.5vw;
    color: #999;
    cursor: pointer;
}

.wrapper .food li .food-right p {
    font-size: 3.6vw;
    color: #333;
}

.wrapper .food li .food-right .fa-plus-circle {
    font-size: 5.5vw;
    color: #0097EF;
    cursor: pointer;
}

/****************** 购物车部分 ******************/
.wrapper .cart {
    width: 100%;
    height: 14vw;
    position: fixed;
    left: 0;
    bottom: 0;
    display: flex;
}

.wrapper .cart .cart-left {
    flex: 2;
    background-color: #505051;
    display: flex;
}

.wrapper .cart .cart-left .cart-left-icon {
    width: 16vw;
    height: 16vw;
    box-sizing: border-box;
    border: solid 1.6vw #444;
    border-radius: 8vw;
    background-color: #3190E8;
    font-size: 7vw;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: -4vw;
    margin-left: 3vw;
    position: relative;
}

.wrapper .cart .cart-left .cart-left-icon-quantity {
    width: 5vw;
    height: 5vw;
    border-radius: 2.5vw;
    background-color: red;
    color: #fff;
    font-size: 3.6vw;
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    right: -1.5vw;
    top: -1.5vw;
}

.wrapper .cart .cart-left .cart-left-info p:first-child {
    font-size: 4.5vw;
    color: #fff;
    margin-top: 1vw;
}

.wrapper .cart .cart-left .cart-left-info p:last-child {
    font-size: 2.8vw;
    color: #AAA;
}

.wrapper .cart .cart-right {
    flex: 1;
}

/*达到起送费时的样式*/
.wrapper .cart .cart-right .cart-right-item {
    width: 100%;
    height: 100%;
    background-color: #38CA73;
    color: #fff;
    font-size: 4.5vw;
    font-weight: 700;
    user-select: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
}
</style>